Hi, sorry for the slow reply. Haven't been on here much lately due to work. Ref the hose you're on about, like you said, I just used bits from the hoses I took off the old system. I can't remember exactly what bits, but there is some there that works fine. At some point I will get round to finding a check valve with only 2 ports on it, so I won't have to blank it.
DOPE with added OCD